Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
Bioresour Technol. 2015 Mar;180:207-13. doi: 10.1016/j.biortech.2014.12.092. Epub 2015 Jan 6.
Drying of wet algal biomass is a major bottleneck in viable commercial production of the microalgal biodiesel. In the present investigation, an oven drying protocol was standardized for drying of wet Scenedesmus biomass at 60, 80 and 100°C with initial sample thickness of 5.0, 7.5 and 10.0mm. The optimum drying temperature was found to be 80°C with a maximum lipid yield of 425.0±5.9mgg(-1) at 15h drying time for 5.0mm thick samples with 0.033kWh power consumption. Partial drying at 80°C up to 10% residual moisture content was efficient showing 93% lipid recovery with 8h drying and a power consumption of 0.017kWh. Scenedesmus biomass was also found to be rich in saturated and mono-unsaturated fatty acids. Thus, the drying protocol demonstrates its suitability to improve the downstream processing of biodiesel production by significantly lowering the power consumption and the drying time.
湿藻生物质的干燥是微藻生物柴油可行商业生产的主要瓶颈。在本研究中，采用烘箱干燥法，以 5.0、7.5 和 10.0mm 的初始样品厚度，在 60、80 和 100°C 下对湿栅藻生物质进行干燥。结果表明，在 5.0mm 厚的样品中，干燥时间为 15 小时，干燥温度为 80°C 时，脂质产率最高，为 425.0±5.9mgg(-1)，功率消耗为 0.033kWh。部分干燥至 80°C 时，残余水分含量达到 10%，效率较高，干燥 8 小时后可回收 93%的脂质，功率消耗为 0.017kWh。栅藻生物质还富含饱和脂肪酸和单不饱和脂肪酸。因此，该干燥方案通过显著降低功耗和干燥时间，证明其适合于改善生物柴油生产的下游处理。
